The Chinese word "孟德斯鸠" is formed through phonetic transliteration, where each character is selected to approximate the sounds of the foreign name "Montesquieu". The characters "孟" (mèng), "德" (dé), "斯" (sī), and "鸠" (jiū) correspond to the syllables "Mon", "tes", "qu", and "ieu" respectively, with the primary purpose being sound imitation rather than conveying meaning through the individual characters.